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Finding the Fourth Proportional to 1,367.52, 2,049.12 and 781.44

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Solution

The fourth proportional to 1,367.52, 2,049.12 and 781.44 is: 1,170.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.52 : 2,049.12 = 781.44 : x
  2. Step 2: Convert to fraction form
    1,367.52/2,049.12 = 781.44/x
  3. Step 3: Cross multiply
    1,367.52x = 2,049.12 × 781.44
  4. Step 4: Simplify right side
    1,367.52x = 1,601,264.33
  5. Step 5: Solve for x
    x = 1,601,264.33/1,367.52
  6. Step 6: Final answer
    x = 1,170.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.